Method and an apparatus for lining a pipe or duct
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United States of America Patent
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Apr 18, 2000
Grant Date -
N/A
app pub date -
Sep 11, 1998
filing date -
Sep 11, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
It is described a method for lining a pipe or a duct through an internal lining of a plastic coated flexible fabric tube adhering to the inner wall of the pipe by means of an adhesive. This method stands for the following steps: filling a metered amount of adhesive into said flexible fabric tube in a uniform distribution over the flexible tube length, introducing said flexible fabric tube into the pipe, wherein one end of said flexible tube is fastened to the rear pipe end with respect to the moving direction, and the flexible tube using turning up is introduced into said pipe, and generating an internal pressure inside said introduced flexible fabric tube by means of supplied water for pressing said flexible tube against the inner wall of said pipe until the adhesive between said flexible tube and the inner wall of said pipe is cured. Here, the water is heated and cooled in controlled manner depending on the temperature values measured inside and outside the pipe for accelerating the curing operation. With this, for different flexible tube diameters different sizes of the rotary drum are used, which include different wall thicknesses thus approximately having the same masses.
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